/*
     Copyright 2007 Joseph M. Ferner

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

using OpenServers.Net.FtpServer.State;

namespace OpenServers.Net.FtpServer.Command {
    /// <summary>
    ///     <para>
    ///         <b>PRINT WORKING DIRECTORY (PWD)</b><br/>
    ///         This command causes the name of the current working
    ///         directory to be returned in the reply.  See Appendix II.
    ///     </para>
    ///     <para>
    ///         <b>Format</b><br/>
    ///         <code>PWD &lt;CRLF&gt;</code>
    ///     </para>
    ///     <para>
    ///         <b>Success:</b>
    ///         <list type="bullet">
    ///             <item><term>257</term><description>"PATHNAME" created.</description></item>
    ///         </list>
    ///     </para>
    ///     <para>
    ///         <b>Errors:</b>
    ///         <list type="bullet">
    ///             <item><term>500</term><description>Syntax error, command unrecognized.</description></item>
    ///             <item><term>501</term><description>Syntax error in parameters or arguments.</description></item>
    ///             <item><term>502</term><description>Command not implemented.</description></item>
    ///             <item><term>421</term><description>Service not available, closing control connection.</description></item>
    ///             <item><term>550</term><description>Requested action not taken. File unavailable (e.g., file not found, no access).</description></item>
    ///         </list>
    ///     </para>
    /// </summary>
    public class PrintWorkingDirectoryCommand : BaseCommand {
        /// <summary>
        /// returns the current directory to the user.
        /// </summary>
        public override void PerformCommand(IFtpServer server, FtpState state, string arguments) {
            if (!string.IsNullOrEmpty(arguments)) {
                state.Listener.Send(state, server.Messages.Get501());
            } else {
                state.Listener.Send(state, server.Messages.Get257(state.CurrentDirectory, Reason257.CurrentDirectory));
            }
        }
    }
}
